Ministry of Jal Shakti
Flood pattern
Central Water Commission  is the nodal organisation entrusted with the task of flood forecasting & early flood warnings in the country. Presently, CWC issues flood forecasts for 332 forecasting stations . These stations cover 20 major river basins in 23 States & 2 Union Territories. As per flood forecasting network of CWC, during the last 3 years, in addition to flood prone States of Assam, Bihar, Uttar Pradesh and West Bengal, extreme floods were witnessed in the States of Andhra Pradesh, Chhattisgarh, Kerala, Karnataka, Madhya Pradesh, Maharashtra, Odisha, Rajasthan, Tamil Nadu and Telangana due to excess rainfall in these States combined with extremely heavy rainfall in short duration. The flood situation in the State of Bihar for last 3 years is given at Annexure-I.
Flood Hazard Atlases have been prepared by Indian Space Research Organisation  in respect of Andhra Pradesh, Assam, Bihar, Odisha, Uttar Pradesh and West Bengal. ISRO has developed long term cumulative flood maps for the States/UT of Gujarat, Jammu & Kashmir, Karnataka, Kerala, Madhya Pradesh, Maharashtra and Tamil Nadu. The flood inundation details as derived from Satellite data are also made available to the stakeholders through the National Database for Emergency Management  and Bhuvan Geoportals.
Flood Forecasting by CWC uses all the latest technology including remote-sensing, Geographical Information System , Internet, Artificial Intelligence and Machine Learning in development/ running/ formulation and calibration of mathematical models and for providing inundation alerts. CWC is issuing 5-day advisory flood forecast at 332 flood and inflow forecasting stations using state-of-art rainfall run off mathematical modelling tools based on rainfall forecast by IMD and results are shared with stakeholders using website https://aff.india-water.gov.in/. These forecasts help in better management of floods by concerned agencies and departments.
The flood management & anti-erosion schemes are planned, investigated and implemented by the State Governments with their own resources as per priority within the State. The Union Government supplements the efforts of the States by way of technical guidance and promotional financial assistance for flood management in critical areas. To strengthen the structural measures of flood management, Ministry had implemented Flood Management Programme  during XI & XII Plan for providing central assistance to States for works related to flood control, anti-erosion, drainage development, anti-sea erosion, etc. which subsequently continued as a component of "Flood Management and Border Areas Programme"  for the period from 2017-18 to 2020-21 and has been further extended up to September 2022. So far, central assistance amounting to Rs. 6,686.79 crore has been released to States/UTs under this programme since inception.
The details of crop area affected due to heavy rain and floods compiled by CWC after receipt of confirmation from respective States for the period from 2018 to 2020 is given in Annexure-II.
This information was given by the Minister of State, for Jal Shakti, Shri Bishweswar Tudu in a written reply in Lok Sabha today.